Baker s oven



(No Model.) 2 Sheets-Sheet 1, S. HALL. Bakers Oven.

No. 232,264. Patented Sept. 14,1880.

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S. HALL. Bakers Oven.

No. 232,264. Patented Sept. 14,1880.

E- n;- n- 1%- Al /test, haven tor UNITED STATES PATENT OFFICE.

SAMUEL HALL, OF CHICAGO, ILLINOIS.

BAKERS OVEN.

SPECIFICATION forming part of Letters Patent No. 232,264, datedSeptember 14, 1880.

Application filed May 10, 1880.

Cook, in the State of Illinois, have invented certain new and usefulImprovements in Revolving Ovens, of which the following is aspecification.

The object of my invention relates to the construction of the furnacefor supplying the heat to the baking-chamber in as direct a manner aspossible, and at the same time have the furnace under control by asystem of dampers, so that the products of combustion can be at any timeentirely shut off from the bakingchamber. My object in this is toobviate the nuisance of dust, gas, or smoke entering the baking-chamberwhen first starting the fire or at any time when supplying fresh fuel orshaking down the ashes in the furnace, and obviatin g the necessity ofcleaning the shelves and keeping the goods clean while in the process ofbaking.

Another object is to furnish, in connection with the furnace,bridge-wall, fines, and damper, a suitable means of supplying the fuelto the furnace, whereby a sufficient amount will be in such a positionas to be self-feeding, and of such quantity as will last for a run often hours, more or less.

My invention relates to that class of ovens known as revolving ovens, inwhich the baking is done on a moving surface, such as shown in thedrawings, or on a horizontal turning table located in the interior ofthe oven or baki l I g-ch amber.

In the accompanying drawings, Figure l is a vertical section through areel-oven. Fig. 2 is a vertical section through the furnace on line asm. Fig. 3 is a horizontal section through the furnace on line y y.

A is an oven, having side walls, A A and front and rear walls B B. Journaled in the side walls is the horizontal shaft 0, carrying thespider C, one of which being at each end of the shaft in the interior ofthe baking-chamber.

D are the shelves, hung in suspension from the ends of the arms formingthe spider. D

is the oven-mouth, through which the articles to be baked are receivedand discharged.

Located in the bottom of the baking-cham- (No model.)

her are the furnace E and fire-pots E E having the usual furnacedoor infront for the reception of fuel or for raking the fire. At the rear endof the furnaces are two flues, F F, leading direct to the open air, forthe escape of the first products of combustion, such as smoke, dust, orgas, so that the same shall not pass into the baking-chamber.

G- is the arch over the furnaces, extending from end to end of thebaking-chamber, and

arched from the bridgewall forward, and of sufficient height to allow ofa free passage from one furnace to the other, the fire-pot of thefurnace being of j ust sufficient depth to hold the fuel.

At the rear end of the furnace, and of sufiicient height above thefire-pot, there are perforations a in the bridge-wall H, forming thesupport for the arch G. These openings may extend from one end of thebridge-wall to the other, as the circumstances may require. There may betwo or more rows of such openings, as may be desired, for the freepassage of the heat out into the baking-chamber.

In the rear of the perforations is a flue, I, formed between the walls Hand J, into which the heat is received before its passage through theflues K K into the baking-chamber.

L L are upright dampers for controlling the passage of heat into thebaking-chamber, said dampers being connected by a rod and operated bythe rod Z, passing through the wall to the outside.

M is a self-feeding device for supplying the fuel to the furnace, placedat such an incline that the fuel will fall of its own specific gravity,the lower end being of sufficient height above the gate-bars to allow ofthe necessary supply to produce a thorough combustion. The upper end ofsaid feeder is open for the reception of fuel, said opening being closedby a tightly-fitting door to prevent the passage of air or gas.

About midway up the feeder, 011 the top, are perforations for the escapeof gas should any collect in the feeder. Said gas, after escapingthrough the perforations, will come in contact with the heated air andflames, and be thus consumed.

The operation of my invention is as follows: The fire on being firstignited will emit more or less gas and smoke, and to prevent itspassage'into the bakin g-chamber I close the dampers L L, which shut ofiall communication with the baking-chamber. The smoke and gas will thenpass out through the fines F F into the open air. t

The dampers should be kept closed until the fire is in a red glow andhas ceased to emit smoke and gas, when the dampers are opened,

and the heat then passes direct into the baking-chamber.

The fiues F I may be arranged to enter the furnace at the sides and passaround and back into one central flue, as indicated in dotted lines F F.

Instead of having the perforations, the wall J may occupy the place ofthe bridge-wall H, when the heat will pass directly into the oventhrough the fiues K. K.

The dampers need not necessarily be upright, but may be placed in ahorizontal position.

0 is an opening in the top of the bakingchamber, the purpose of which isto cool the oven quickly. I first close the dampers K K, and then openthe damper 0, when the heat passes out into the flue F, thence into theopen air. I also place in the flue F a damper, f, for the purpose ofpreventing any escape of heat to the air without having first passedinto the baking-chamber.

It is obvious that by an oven with furnaces of my construction, havingthe self-feeder, a large amount of time and labor will be saved, andalso that by my arrangement of flues and dampers the baking-chamber willbe thoroughly heated, and at the same time the dust, gas, and smokeprevented from entering.

It will be seen by my form of construction the two fires are in achamber formed by the wall B, arch G, bridge-wall H, and the hearth,thus forming one large heating-chamber for the air before its passageinto the bakingchamber.

My arrangement of lines and dampers may be used with one or more fires,the drawings showing but two fires.

My self-feeding device is applicable. to any form of furnace now used inrevolving ovens, my arrangement of flues not'bein g necessary to itsworking.

Having thus described my invention, what I wish to claim is- 1. In arevolving oven, the furnace E, constructed with perforated rearbridgewall, H, and arch G, extending from side wall to side wall, wallB, and hearth, together forming the combustion-chamber, in which arelocated two or more sets of grate-bars, as shown and de scribed.

2. In a revolving oven, the furnace E, flue I, wall J, damper L, andflue K, as shown and described.

3. In a revolving oven, the furnace E, fine I, wall J, damper L, flue K,in combination with flue F, as shown and described.

4. The furnace E, provided with self-feedin g device M, arranged asshown and described, in combination with flue I, wall J, damper L, andlines K and F, substantially as shown and described.

SAMUEL HALL.

Vitnesses RoBT. W. GooDE, CHARLES PIoKLns.

